CO2 Emissions by Diet

avg american vegan lacto-ovo mad meat eater

chicken 0.12 5.2% 0.12milk 0.44 11.4% 0.92 23.6% 0.19eggs 0.06 1.4% 0.17 4.2%beef (grain fed) 0.61 3.2% 3.81pork 0.70 5.6% 2.49lamb 0.06 0.2%fish (avg value) 0.06 0.8%animal total 2.05 27.7% 0.00 0.0% 1.08 27.7% 6.60

veg (avg value) 0.14 72.3% 0.19 100% 0.14 72.3% 0.10

total 2.19 100% 0.19 100% 1.22 100% 6.70

Assumptions 3,774 Kcal a day 1,377,510 Kcal a year

CO2 Emissions by Food Type

chicken 15.9 34.5% 5.52 1.53 0.14 1.67 0.0000017milk 18.9 25.6% 4.85 1.35 1.47 2.82 0.0000028eggs 27.8 32.3% 8.93 2.48 0.45 2.93 0.0000029beef (grain fed) 34.5 43.5% 15.63 4.34 9.48 13.82 0.0000138pork 66.7 40.0% 27.03 7.51 1.52 9.03 0.0000090lamb 200.0 43.5% 83.33 23.15 2.82 25.97 0.0000260

fish (avg value) 21.74 6.04 6.04 0.0000060herring 2.0 45.5% 0.91 0.25 0.25 0.0000003tuna 20.0 83.3% 17.24 4.79 4.79 0.0000048salmon (farmed) 40.0 43.5% 17.54 4.87 4.87 0.0000049shrimp 142.9 76.9% 111.11 30.86 30.86 0.0000309

veg (avg value) 0.50 0.14 0.14 0.0000001corn 0.40 0.11 0.11 0.0000001soy 0.24 0.07 0.07 0.0000001apple 0.91 0.25 0.25 0.0000003potatoes 0.81 0.23 0.23 0.0000002

FF = Fossil Fuels gr CO2 = grams CO2 equivalence

tonnes CO2/yr

% of calories

tonnes CO2/yr

% of calories

tonnes CO2/yr

% of calories

tonnes CO2/yr

Kcal FF/Kcal protein

Kcal protein/Kcal food(% protein)

Kcal FF/Kcal food

gr CO2 (FF)/Kcal food

gr CO2 (methane) /Kcal food

gr CO2 (total)/Kcal food

tonnes CO2/Kcal food

Assumptions + Conversions3.96825396825 btu/kcal 1000000 gr/ton

0.00000007 ton co2/btu ff 0.277777778 gr co2/kcal ff2.7777778E-07 ton co2/kcal ff

Table 2 from Report (underlying values from Pimentel)

chicken 6.3 2.9 18.1milk 5.3 3.9 20.6eggs 3.6 3.1 11.2beef (grain fed) 2.9 2.3 6.4pork 1.5 2.5 3.7lamb 0.5 2.3 1.2fish (avg) 4.6 (table 3)herring 50 2.2 110tuna 5 1.2 5.8salmon (farmed) 2.5 2.3 5.7shrimp 0.7 1.3 0.9veg (avg) 200 (figure 3)corn 250soy 415apple 110potatoes 123

http://www.epa.gov/climatechange/emissions/downloads/emissionsfactorsbrochure2004.pdf

natural gas 116.39 0.0528 0.0004536 lbs to tonnesfuel oil 159.66 0.0724motor gasoline 154.91 0.0703diesel 160.3 0.0727bituminous coal 203.99 0.0925

http://www.epa.gov/climatechange/emissions/ind_assumptions.htmlNational average emissions factor for electricity is 1.37 pounds CO2 per kilowatt-hour

100 x Kcal protein/Kcal input

Kcal protein/Kcal total

100 x Kcal output/Kcal input

lbs co2/mmBtu

tons co2/mmBtu

mad meat eater avg american on diet chicken lover

5.0% 0.080 5.2% 0.64 0.285.0% 0.291 11.4%

0.037 1.4%20.0% 0.402 3.2%20.0% 0.462 5.6%

0.038 0.2%0.042 0.8%

50.0% 1.35 27.7% 0.64 27.7%

50.0% 0.091 72.3% 0.14 72.3%

100% 1.44 100% 0.78 100%

0.167 0.3680.282 0.6200.293 0.6451.382 3.0400.903 1.9862.597 5.713

0.604 1.3290.025 0.0560.479 1.0540.487 1.0723.086 6.790

0.014 0.0310.011 0.0240.007 0.0150.025 0.0560.023 0.050

% of calories

tonnes CO2/yr

% of calories

tonnes CO2/yr

% of calories

kg CO2 (total)/100 Kcal food

lbs CO2 (total)/100 Kcal food